fix(hud): state word first, layer names last; CJK cap by locale

Follow-up review fixes:

- The HUD line is STATE | text | LAYERS for the AI summary and the
  fallback line, so the narrow minimal and cyber layouts show both the
  warning and the summary. get_hud_caption builds its caption the same
  way. The unused "{state} {layers}" key is pruned from the catalogs.
- The 20-character cap applies only when the request locale is Japanese
  or Chinese; other languages keep five words around a Han place name.
- enabledLayers names are localized too, and the instructions name layers
  only from enabledLayerLabels, never from feedProvenance or its note.
- The keyless test restores GEV_RATELIMIT_OPENAI_PER_MIN again; comments
  and docs updated.

src/i18n/locales/es.json

@@ -2025,7 +2025,6 @@
   "Globe field image unavailable": "Imagen del campo en el globo no disponible",
   "status chip|UNAVAILABLE": "NO DISP.",
   "Uses registered content or linked media. Those external files are not included in a scene bundle. Their original notices still apply.": "Contiene referencias a contenido registrado o medios vinculados. Esos archivos externos no se incluyen en un paquete de escena. Sus avisos originales siguen vigentes.",
-  "{state} {layers}": "{state}: {layers}",
   "Selected Space Mission": "Misión espacial seleccionada",
   "{duration}s + {hold}s": "{duration} s + {hold} s",
   "Configured Source": "Fuente configurada",